摘要
氧在高温合金中是作为有害杂质元素存在的,通常是疲劳裂纹的萌生地及扩展通道,从而影响高温合金的蠕变、持久强度等性能。本研究在现有条件下,确定了氧在镍基高温合金中存在主要形态为氧化铝夹杂,根据得到的实验数据分析和计算,初步研究了真空感应熔炼条件下碳和铝对镍基高温合金的脱氧机理,实验中氧含量最低为0.0006%,达到了小于0.001%的目标值。
Oxygen is a harmful element in Ni-base superalloy, which is usually the origin also the propagating passageway of fatigue cracks and will cause creep effect and affect the lasting strength. The influences of carbon and aluminium on deoxidation during vacuum induction melting(VIM) in CaO crucible for Ni-base superalloy is studied. It is found that oxygen in the alloy is mainly in the form of alumina. In the deoxidation process the variation of oxygen content in the alloy was experimentally investigated and found that the minimum oxygen content is 0.0006% that is lower than the target value 0.001%.
出处
《真空》
CAS
北大核心
2005年第3期40-42,共3页
Vacuum
关键词
镍基高温合金
真空感应熔炼
脱氧
Ni-base superalloy
vacuum induction melting(VIM)
deoxidation
